Ti Series Installation and Operation Instructions
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Trinity
27
Near Boiler Plumbing
Pressure Relief Valve -
A 30PSI Pressure Relief Valve is factory supplied with all boilers. Since all Trinity Ti boilers, excluding
Ti100’s and Ti150’s sold in Canada (MAWP=30PSI), have a maximum operating pressure of 145PSI, a pressure relief valve
with a higher discharge pressure rating (up to the MAWP of the boiler) may be used as long as the relieving capacity is in excess
of the maximum input capacity of the boiler, see boiler rating plate.
The pressure relief valve must be installed at the boiler outlet and in the vertical position, as shown in Figures 9-1(a) through (d),
with the drain pipe outlet exiting the side of the pressure relief valve horizontally and elbowing down. If using a higher pressure
relief valve, ensure the pressure gauge is sized to display the higher pressure valve.
If installed with the incorrect orientation (horizontally with drain pipe out the bottom) the relief valve
may not function properly resulting in property damage or personal injury.
Ensure the discharge of the pressure relief is piped to a location where the steam or water will not cause
property damage or serious injury.
Pressure Gauge –
All models come with a factory supplied 30PSI Pressure Gauge. The pressure gauge must be installed at the
appliance’s outlet prior to any circulators and in the vicinity of the pressure relief valve. See Figures 9-1(a) through (d).
Figure 9-1(b) Ti100-150 Canada
Relief Valve Port
Boiler Outlet
Boiler Inlet
Figure 9-1(a) Ti200 and Ti100-150 US
Boiler Inlet
Boiler Outlet
Relief Valve Port
Figure 9-1(c) Ti200 Combi and Ti150 Combi US
Relief Valve Port
Boiler Outlet
Boiler Inlet
Combi Return
DHW Outlet
DHW Inlet
Combi Return Manifold
PN: 82470-2
